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The Single UNIX &reg; Specification, Version 2<br>
Copyright &copy; 1997 The Open Group

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<h4><a name = "tag_000_001_023">&nbsp;</a>NAME</h4><blockquote>
_tolower - transliterate upper-case characters to lower-case
</blockquote><h4><a name = "tag_000_001_024">&nbsp;</a>SYNOPSIS</h4><blockquote>
<pre><code>

#include &lt;<a href="ctype.h.html">ctype.h</a>&gt;

int _tolower(int <i>c</i>);
</code>
</pre>
</blockquote><h4><a name = "tag_000_001_025">&nbsp;</a>DESCRIPTION</h4><blockquote>
The
<i>_tolower()</i>
macro is equivalent to
<i>tolower</i>(c)
except that the argument
<i>c</i>
must be an upper-case letter.
</blockquote><h4><a name = "tag_000_001_026">&nbsp;</a>RETURN VALUE</h4><blockquote>
On successful completion,
<i>_tolower()</i>
returns the lower-case letter corresponding to the argument passed.
</blockquote><h4><a name = "tag_000_001_027">&nbsp;</a>ERRORS</h4><blockquote>
No errors are defined.
</blockquote><h4><a name = "tag_000_001_028">&nbsp;</a>EXAMPLES</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_001_029">&nbsp;</a>APPLICATION USAGE</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_001_030">&nbsp;</a>FUTURE DIRECTIONS</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_001_031">&nbsp;</a>SEE ALSO</h4><blockquote>
<i><a href="tolower.html">tolower()</a></i>,
<i><a href="isupper.html">isupper()</a></i>,
<i><a href="ctype.h.html">&lt;ctype.h&gt;</a></i>,
the <b>XBD</b> specification, <a href="../xbd/locale.html"><b>Locale</b>&nbsp;</a>.
</blockquote><h4>DERIVATION</h4><blockquote>
Derived from Issue 1 of the SVID.
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UNIX &reg; is a registered Trademark of The Open Group.<br>
Copyright &copy; 1997 The Open Group
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